JPH10109721A - Cargo stopping device in roller conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to stop a cargo without projecting a stopper from between rollers in a roller conveyor. SOLUTION: In a roller conveyor in which a plurality of rollers 3 are rotatably supported between a pair of right and left frame bodies 2 with an appropriate interval in a longitudinal direction, at least one roller 3a of the rolles 3 is made possible to move to a cargo transportation position which is at the same height as a transportation surface L formed by the top of the other rollers 3 and to a cargo stopping position which is situated at a position above the transportation surface L and can stop a cargo C which is sent along the transportation surface L.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller conveyor for conveying a conveyed product by rotating rollers.

[0002]

2. Description of the Related Art Roller conveyors that convey articles by rotating rollers are provided with load stopping devices for stopping the conveyance of articles for various purposes.

For example, when some work is performed on a load conveyed by a roller conveyor on a roller conveyor, and when the work is completed, the next load is advanced and the same work is performed. Need to send the load intermittently. In such a case, it is necessary to stop the next load until the work is completed. Therefore, a load stopping device is provided to intermittently advance the load.

[0004] When a large number of loads are conveyed, a load stopping device may be used to prevent the loads from approaching too close to each other. In such cases, a load stopping device may be used.

As described above, a load stopping device is provided for various purposes, and a conventional load stopping device is disclosed in Japanese Utility Model Publication No. 7-41704, "Conveyed object stopping device on conveyor". In addition, means for projecting the stopper from between the rollers is employed. this is,
A conveyance object detection device is provided at an appropriate position on the roller conveyor, and when necessary, a stopper is protruded above the conveyance surface from between the rollers to stop the conveyance of the load, and a predetermined time has elapsed. Later, the stopper is lowered to send the stopped load.

[0006]

However, the load is small,
In the case of a roller conveyor having a narrow gap between the rollers, the stopper cannot be protruded from between the rollers.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the related art, and has as its object to stop a load without projecting a stopper between rollers.

[0008]

According to the present invention, the above-mentioned problem is solved as follows. (1) In a roller conveyor in which a plurality of rollers are rotatably supported in a front-rear direction between a pair of left and right frame members at appropriate intervals, at least one of the rollers is formed by an upper end of another roller. A load transfer position that is at the same height as the transfer surface, and a load stop roller that can be lifted and lowered to a load stop position that is located above the transfer surface and that can stop the load sent along the transfer surface. I do.

(2) In the above item (1), the frame is provided with lifting means for lifting and lowering the load stopping roller.

(3) In the above item (1) or (2), the elevating means includes a rotating arm having one end pivotally supported by a frame with a horizontal axis, and an erecting member standing upright from an end of the rotating arm. A pair of left and right bearing means for pivotally supporting both ends of the load stopping roller at the upper end, and driving means provided between the frame and the rotating arm for rotating the rotating arm about a horizontal axis are provided. .

(4) In any one of the above items (1) to (3), there is provided a rotation driving means for rotating the load stopping roller only when it is located at the load transfer position.

(5) In the above item (4), in the roller conveyor in which a roller adjacent to the load stopping roller is driven to rotate, the rotation driving means of the load stopping roller is pivotally mounted on the frame. And at the same time, always makes frictional contact with the adjacent roller, and makes frictional contact with the load stopping roller when the load stopping roller reaches the load transport position.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to FIGS.
It will be described based on.

The roller conveyor (1) comprises a pair of frame members (2) which are disposed in parallel to each other at a predetermined interval and are oriented in the front-rear direction.
In addition, a number of rollers (3) are rotatably supported at appropriate intervals in the front-rear direction.

A drive shaft (4) driven by a motor (not shown) through a transmission extends below each roller (3) in parallel with the frame (2).
(4) and each roller (3) are connected via a belt (7).

That is, a groove (5) provided along the circumference of the roller (3) and a pulley (6) integrally provided on the drive shaft (4) corresponding to each roller (3). , The belt (7) is hung around by crossing, and the rotation of the drive shaft (4) drives each roller (3) to rotate via the belt (7).

The surface formed by the upper ends of these rollers (3) is the transport surface L, and the load C placed on the rollers (3) is
Moves forward to the left in FIGS. 1 and 2 by the rotation of the roller (3).

The roller conveyor (1) has a load stopping device.
(8) is provided. The load stopping device (8) will be described.

During the transfer of the load C, as shown in FIG. 2, one roller (3a) for stopping the load is connected to the upper end of the other roller (3).
It is located at the load transfer position at the same height as the transfer surface L formed by (9). When the load (C) is stopped, the roller (3a) rises above the transport surface (L) as shown in FIGS. 1 and 3 to reach the load stop position, and stops the feed of the load (C).

The lifting means (10) for raising and lowering the load stopping roller (3a) is provided with a horizontal axis (1) parallel to the load stopping roller (3a).
5) The left and right pivot arms (11) whose rear ends are pivotally supported by the frame (2) and project upward from the front end of the pivot arms (11), and support the stop roller (3a) at the upper end. Bearing means (12), a driving means (13) for rotating the rotating arm (11) up and down, and connecting the driving means (13) to the left and right rotating arms (11) and (11). And a coupling mechanism (14).

Each of the rotating arms (11) is made of an inverted L-shaped angle member facing outwardly when viewed from the front.
It is located inside (2), and is arranged in parallel with the frame (2) and at predetermined intervals on the left and right.

The bearing means (12) comprises a rotating arm (11) (11)
The left and right bearings (1) are attached to the upper end of a support rod (17) provided upright at both ends of the left and right connecting rod (16) connecting the tips of the
8) is fixed. The end of the pivot (19) of the load stopping roller (3a) is rotatably supported by the bearing (18).

A downward facing U-shaped substrate (20) is disposed between a pair of left and right rotating arms (11) (11), and the substrate (20) is
The front and rear connecting rods (21) (21) are fixed between the frames (2) and (2).

Between the left and right side plates (23) and (23) of the substrate (20),
A driving means (13) composed of an air cylinder pointing in the front-rear direction is provided. The rear end of the cylinder (24) of the driving means (13)
Pivotally supported by the horizontal shaft (15), the piston rod (25) extends forward from the cylinder (24).

The driving means (13) is connected via a connecting mechanism (14).
The left and right rotating arms (11) and (11) are vertically rotated about a horizontal axis (15).

A left-right support shaft (27) located behind the load stopping roller (3a) is provided on the left and right side plates (23) (23). An intermediate portion of an inverted L-shaped crank lever (28) (28) is fixed to the support shaft (27) at predetermined intervals on the left and right sides.

The lower ends of the hanging pieces behind the crank levers (28) and (28) are connected by a connecting shaft (29), and the connecting rod (29) is connected to the piston rod of the driving means (13).
The joint (26) at the front end of (25) is connected. A long hole (30) in the front-rear direction is formed at the upper end of the forward piece of the crank lever (28), and the left and right rotating arms (1) are provided in the left and right long holes (30) (30).
1) A locking shaft (31) installed on (11) penetrates.

These support shaft (27), levers (28) (28), connecting shaft
(29), the coupling shaft (31) constitutes the coupling mechanism (14).

When the piston rod (25) of the driving means (13) reciprocates, the crank lever (28) rotates about the support shaft (27) as a fulcrum. By the rotation of the crank lever (28), the rotation arm (11) is rotated around the horizontal axis (15) via the locking shaft (31). Roller (3a) at the upper end of the bearing means (12) provided at the front end by the rotation of the rotation arm (11)
Moves to a load transfer position at the same height as the transfer surface L and a load stop position protruding above the transfer surface L to stop the load C.

In the vicinity of the load stopping roller (3a), there is provided a rotation driving means (32) for rotating only when the roller is at the load transfer position.

The rotation driving means (32) is provided with left and right frame bodies (2).
(2) Support plates (33) and (33) fixed to the respective inner surfaces, and friction rollers rotatably supported by these support plates (33) and (33).
(34) and (34).

The friction roller (34) is a load stopping roller (3a).
And the roller (3b) adjacent to the front of the roller (3b). Thus, the friction roller (34) is connected to the adjacent roller (3b).
When the load stopping roller (3a) reaches the load transfer position, the load stopping roller (3a) also comes into frictional contact with the load stopping roller (3a).

The case where the load C is intermittently sent in the above-described embodiment will be described.

When working on the load C on the roller conveyor (1), it is necessary to stop the next load C. In this case, the driving means (13) is driven by a detection device or a switch (not shown) so that the piston rod (2
5) Stretch. Due to this extension, the connecting shaft (29) rotates clockwise in FIGS. 1 and 2, and the crank lever (28) also rotates in the same direction about the shaft (27) as a fulcrum. Accordingly, the locking shaft (31) loosely fitted in the long hole (30) of the front end of the front piece of the crank lever (28) and fixed to the rotating arm (11) is ) Is rotated clockwise about the horizontal axis (15), and the load stopping roller (3a) is raised via the bearing means (12) at the front end of the rotating arm (11) to the load stopping position. And the load C is stopped (see FIG. 1).

At this time, the load stopping roller (3a) is separated from the friction roller (34) and becomes free.

When the operation for one load C is completed, the next load C is sent. In this case as well, after a predetermined time has elapsed, or by a detection device or switch (not shown), the driving means (1
3) is driven to extend and retract the piston rod (25).

By this expansion and contraction, the connecting shaft (29) is
In FIG. 2, at the same time as rotating counterclockwise, the pair of crank levers (28) (28) also rotate in the same direction about the support shaft (27) as a fulcrum. Accordingly, the locking shaft (31) which is loosely fitted in the long hole (30) of the front end of the forward facing piece of the crank lever (28), and is fixed to the rotating arm (11), Is rotated counterclockwise. As a result, the load stopping roller (3a) descends to a load transfer position at the same height as the transfer surface L, and advances the load C (see FIG. 2).

At this time, the load stopping roller (3a) comes into frictional contact with the friction roller (34), and the adjacent roller (3b) comes into contact with the friction roller (34).
It is rotationally driven through (34).

Accordingly, the load C can be stopped without projecting the stopper from between the rollers (3). Further, since the load stopping roller (3a) is moved up and down by the driving means (13), it can be moved up and down reliably and instantaneously.

In the load stopping device (8) of the embodiment, the frame (2) is provided with an elevating means (10) so that the load stopping roller (3) is provided.
Although a) is configured to move up and down, for example, the load stopping roller (3a) may be configured to move up and down from above the roller conveyor (1). Alternatively, the load stopping roller (3
In some cases, a) is provided with a lever to manually move the load stopping roller (3a) up and down.

The driving means (13) may be a hydraulic cylinder, a motor, an electromagnetic driving means or the like in addition to the air cylinder. The rotating arm (11) may be one, and further, the driving means (13) drives the rotating arm (11) to rotate the load stopping roller.
The configuration is not limited to the above-described embodiment as long as (3a) is the elevating / lowering means (10). Further, the rotation drive means (32)
It may be carried out without providing.

[0042]

【The invention's effect】

(a) According to the configuration of the first aspect, the load can be stopped without projecting the stopper from between the rollers. Therefore, the present invention can be applied to a roller conveyor for conveying a small load.

(B) According to the structure of the second aspect, the load stopping roller can be raised and lowered reliably by the lifting and lowering means, and it is not necessary to provide the lifting and lowering means above the roller conveyor. sell.

(C) According to the configuration of claim 3, the load stopping roller can be raised and lowered instantly with certainty.

(D) With the configuration of claim 4, the load stopping roller is driven to rotate at the load transfer position to transfer the load.

(E) With the configuration of claim 5, the load stopping roller is driven to rotate at the load transfer position with a simple structure,
And it becomes free at the load stop position.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional side view when a load stopping roller according to an embodiment of the present invention is located at a load stopping position.

FIG. 2 is a central longitudinal sectional side view when a load stopping roller is located at a load transport position.

FIG. 3 is a vertical sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a perspective view of a load stop position.

[Explanation of symbols]

 (1) Roller conveyor (2) Frame (3) Roller (3a) Roller for stopping load (3b) Roller (4) Drive shaft (5) Groove (6) Pulley (7) Belt (8) Load stopping device ( 9) Upper end (10) Lifting means (11) Rotating arm (12) Bearing means (13) Driving means (14) Connecting mechanism (15) Horizontal shaft (16) Connecting rod (17) Supporting rod (18) Bearing (19 ) Pivot (20) Substrate (21) Connecting rod (23) Side plate (24) Cylinder (25) Piston rod (26) Coupling (27) Support shaft (28) Crank lever (29) Connecting shaft (30) Elongated hole (31 ) Locking shaft (32) Rotation drive means (33) Support plate (34) Friction roller

Claims (5)

[Claims] 1. A roller conveyor in which a plurality of rollers are rotatably supported between a pair of left and right frame bodies at appropriate intervals in the front-rear direction, wherein at least one of the rollers is connected to the upper end of another roller. A load stopping position, which can move up and down to a load transfer position that is at the same height as the formed transfer surface and a load stop position that is located above the transfer surface and can stop loads sent along the transfer surface. A load stopping device for a roller conveyor, wherein the device is a roller. 2. The load stopping device for a roller conveyor according to claim 1, wherein the frame has lifting means for raising and lowering the load stopping roller. 3. A lifting arm, one end of which is pivotally supported by a frame with a horizontal axis, and one end of which is erected from a tip end of the rotation arm, and supports both ends of a load stopping roller at an upper end. 3. The roller conveyor according to claim 1, further comprising a pair of left and right bearing means, and a driving means provided between the frame body and the rotating arm for rotating the rotating arm about a horizontal axis. Load stopping device. 4. The load stopping device in a roller conveyor according to claim 1, further comprising a rotation drive unit that rotates the load stopping roller only when the load stopping roller is located at a load transfer position. 5. A roller conveyor wherein a roller adjacent to a load stopping roller is driven to rotate.
Rotation driving means of the load stopping roller is pivotally mounted on the frame,
And always in frictional contact with the adjacent roller,
5. The load stopping device in the roller conveyor according to claim 4, further comprising a friction roller configured to make frictional contact with the load stopping roller when the load stopping roller reaches the load transfer position.